1123356677789 has 2 divisors, whose sum is σ = 1123356677790. Its totient is φ = 1123356677788.

The previous prime is 1123356677777. The next prime is 1123356677791. The reversal of 1123356677789 is 9877766533211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1113088300900 + 10268376889 = 1055030^2 + 101333^2 .

It is a cyclic number.

It is not a de Polignac number, because 1123356677789 - 2¹⁶ = 1123356612253 is a prime.

Together with 1123356677791, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1123356677189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561678338894 + 561678338895.

It is an arithmetic number, because the mean of its divisors is an integer number (561678338895).

Almost surely, 2^{1123356677789} is an apocalyptic number.

It is an amenable number.

1123356677789 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123356677789 is an equidigital number, since it uses as much as digits as its factorization.

1123356677789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80015040, while the sum is 65.

The spelling of 1123356677789 in words is "one trillion, one hundred twenty-three billion, three hundred fifty-six million, six hundred seventy-seven thousand, seven hundred eighty-nine".